Theorem 14 [1]}
Let \(m_1, m_2 \in V\)  with \(m_1<m_2\)  and \(\mathcal {G}(x) \in L_{1}[m_1, m_2].\)  If \(\mathcal {G} \in P(V),\)  then
\(\mathcal {G}\left(\frac{m_1+m_2}{2}\right) \le \frac{2}{m_2-m_1} \int _{m_1}^{m_2} \mathcal {G}(x) dx \le 2[\mathcal {G}(m_1)+\mathcal {G}(m_2)]\) 
